The shuttle-shaped perceptual vortex was continually spinning inside Chen Mu, though it was now twice as big as when it had just taken form.
It was going to be Chen Mu's thirty-third test of the perception in his body. The test procedures were very detailed. To find out the different characteristics exhibited by the vortex at different rotational speeds, he did all the examinations systematically and in extreme detail.
From the results in front of him, he had separated the rotational speed of the vortex inside him into three phases; the slow-speed phase, the middle-speed phase, and the high-speed phase. He had also subdivided each of the phases into five sub-levels.
